WO2003043032A1 - Thermistance ctp polymere et capteur thermique - Google Patents

Thermistance ctp polymere et capteur thermique Download PDF

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Publication number
WO2003043032A1
WO2003043032A1 PCT/JP2002/011889 JP0211889W WO03043032A1 WO 2003043032 A1 WO2003043032 A1 WO 2003043032A1 JP 0211889 W JP0211889 W JP 0211889W WO 03043032 A1 WO03043032 A1 WO 03043032A1
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WIPO (PCT)
Prior art keywords
conductive polymer
electrode
polymer
electrode piece
electrodes
Prior art date
Application number
PCT/JP2002/011889
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English (en)
Japanese (ja)
Inventor
Hiroyuki Koyama
Original Assignee
Tyco Electronics Raychem K.K.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tyco Electronics Raychem K.K. filed Critical Tyco Electronics Raychem K.K.
Priority to EP02803119A priority Critical patent/EP1492131B1/fr
Priority to AT02803119T priority patent/ATE549724T1/de
Priority to US10/495,598 priority patent/US20050062581A1/en
Publication of WO2003043032A1 publication Critical patent/WO2003043032A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/1406—Terminals or electrodes formed on resistive elements having positive temperature coefficient

Definitions

  • the present invention relates to a polymer PTC thermistor and a temperature sensor using the same.
  • the polymer PTC thermistor is a device that uses a positive resistance temperature characteristic of a conductive polymer, which changes its conductivity by thermal expansion, that is, a PTC (Positive Temperature Coefficient) to interrupt current supply.
  • FIG. 6 is a perspective view of a conventional polymer PTC thermistor.
  • reference numeral 101 denotes a conductive polymer
  • 102 and 103 denote electrodes bonded to the conductive polymer 101
  • 104 and 105 denote non-conductive electrodes covering the electrodes 102 and 103 with the conductive polymer.
  • the conductive polymer 101 which is a resin film, has a rectangular shape and a uniform thickness in a plan view, and is a polymer resin body formed by, for example, kneading polyethylene and carbon black and then crosslinking by radiation. .
  • the electrodes 102 and 103 are provided at both ends of the plate-shaped conductive polymer 101, respectively.
  • the electrode 102 is composed of a copper electrode piece 102 a provided along one side surface 101 a of the conductive polymer 101 and a conductive polymer connected to the electrode piece 102 a. It comprises a base 102b provided at one end of 101, and a nickel foil 102c interposed between the conductive polymer 101 and the electrode piece 102a.
  • the electrode 103 has the same structure as the electrode 102, and includes a copper electrode piece 103a provided along the other side face 101b of the conductive polymer 101, and a conductive polymer 101 connected to the electrode piece 103a. It comprises a base 103b provided at the other end, and a nickel foil 103c interposed between the conductive polymer 101 and the electrode piece 103a.
  • the electrode piece 102a has the same width as the conductive polymer 101, and the tip is formed in a rectangular shape to provide a parallel gap between the electrode 103 and a counter electrode 103 (electrode piece 103d described later).
  • the base 102b is formed by integrating an electrode piece 102a and a copper electrode piece 102d partially left on the other side surface 101b with a solder coating layer 102e.
  • the electrode piece 103a has the same width as the conductive polymer 101, the tip is formed in a rectangular shape, and is formed by providing a parallel gap between the electrode 102 and the electrode 102 (the electrode piece 102d described above). I have.
  • the base 103b is formed by integrating an electrode piece 103a and a copper electrode piece 103d partially left on one side face 101a with a solder coating layer 103e.
  • the resin film 104 is formed so as to cover the side surface 101a of the conductive polymer 101, excluding the base 102b and the electrode piece 102d, except for the electrode piece 102a.
  • the resin film 105 is also formed so as to cover the side face 101b of the conductive polymer 101 with the electrode piece 103a except for the base 103b and the electrode piece 103d.
  • the polymer PTC semiconductor configured as described above
  • the conductive polymer 101 thermally expands and cuts off the current, so that it can function as a switch triggered by the environmental temperature where the conductive polymer 101 is placed.
  • the polymer PTC thermistor described above has an overcurrent between the electrodes 102 and 103 When this occurs, the conductive polymer 101 expands due to self-heating due to Joule heat and cuts off the current. When the excess current is released, the conductive polymer 101 returns to a state where it can be energized. It is also possible to function as a switch triggered by the magnitude of the current flowing.
  • the electrode piece 102a is arranged so as to overlap with one side surface of the conductive polymer 101, the electrode piece 102a is arranged from the longitudinal side edge of the conductive polymer 101. Side edges of 02a and nickel foil 102c are exposed.
  • the electrode piece 103a overlaps with the other side surface of the conductive polymer 101, the electrode piece 103a and the nickel foil 103c also extend from the longitudinal side edge of the conductive polymer 101. Side edges are exposed.
  • the electrode pieces 102a and 103a and the side edges of the nickel foils 102c and 103c are always in contact with air, so they are easily affected by moisture in the air, Gradually oxidizes as time elapses. These oxidation phenomena proceed particularly actively between the conductive polymer 101 and the nickel foils 102c and 103c, causing poor contact between the conductive polymer 101 and the electrode pieces 102a and 103a. This is a major problem because it causes a problem in the performance of the polymer PTC, which is a factor that hinders power distribution.
  • the size of conductive polymer 101 is long side X short side X thickness: 1.6 OimX 0-8 OmmX 0.62 mm or less
  • the contact area between the conductive polymer and the electrode piece becomes smaller as the size of the polymer PTC thermistor becomes smaller.
  • the present invention relates to a polymer comprising a conductive polymer having PTC characteristics and an electrode bonded to the conductive polymer.
  • the electrode is disposed along a side surface of the conductive polymer at a position separated from an edge of the side surface, and a resin film covers the certain side surface so as to surround the electrode. .
  • the electrode is disposed along a certain side surface of the conductive polymer at a position separated from the edge of the side surface, and further, by forming a resin film covering the side surface so as to wrap the electrode, the electrode is formed.
  • the electrode since it is separated from the boundary between the conductive polymer and the resin film, which is likely to start oxidation, and is covered with the resin film on the conductive polymer, moisture does not enter between the conductive polymer and the electrode. This prevents oxidation of the electrodes.
  • the conductive polymer and the resin film overlap each other around the electrode to form a corrosion-resistant region that blocks the entry of moisture, this also prevents the electrode from being oxidized.
  • the conductive polymer is formed in a plate shape, the electrodes are distributed to the two side surfaces of the conductive polymer, one electrode is arranged, and a resin film covering the two side surfaces is formed so as to surround the electrodes. It is desirable to do. If this structure is adopted, operations such as attaching electrodes to the conductive polymer and forming a resin film covering the electrodes will be easy, and productivity will be improved when manufacturing polymer PTC thermistors.
  • two electrodes may be disposed on a certain side surface of the conductive polymer at a distance from each other, and a resin film covering the side surface may be formed so as to surround the two electrodes. Even if this structure is adopted, it is easy to perform operations such as attaching electrodes to the conductive polymer and forming a resin film that covers the electrodes, and productivity can be improved when manufacturing polymer PCTs. .
  • the polymer PCT semiconductor having the above-mentioned characteristics can be used as a temperature detecting element by a switching function using an ambient temperature as a trigger, and is particularly suitable for a temperature sensor.
  • the thermal expansion temperature of the conductive polymer that is, the temperature at which the conductive path is interrupted, can be arbitrarily set by changing the composition of the conductive polymer itself or adjusting the amount of carbon black. Is possible. Therefore, the thermal expansion temperature of the conductive polymer is set to a certain value, and if there is a current between the two electrodes, the temperature of the object is lower than a certain value, and if the current is interrupted, it is determined that the temperature exceeds a certain value.
  • the polymer PTC semiconductor of the present invention as a temperature detecting element, it is possible to narrow the target temperature and detect the temperature clearly.
  • the polymer PCT semiconductor of the present invention in which the thermal expansion temperature of the conductive polymer is set in consideration of the upper limit temperature at which the circuit board can normally operate, is installed on the circuit board of various electric devices. As a result, the circuit is shut off when the board generates abnormal heat, and the maintenance of electrical equipment can be improved.
  • FIG. 1 is a diagram showing a polymer PTC semiconductor according to a first embodiment of the present invention
  • FIG. 1A is a plan view
  • FIG. 1B is a back view
  • FIG. 1C is a front view
  • FIG. 1D is a rear view
  • FIG. 1E is a left side view
  • FIG. 1F is a right side view.
  • FIG. 2 is a perspective view of a polymer PTC thermistor according to the first embodiment.
  • FIG. 3 is a view showing step by step the production process of the polymer PTC thermistor according to the first embodiment.
  • FIG. 4 is a diagram showing a polymer PTC thermistor according to the second embodiment of the present invention
  • FIG. 4A is a plan view thereof
  • FIG. 4B is a rear view
  • FIG. 4C is a front view
  • 4D is a rear view
  • FIG. 4E is a left side view
  • FIG. 4F is a right side view.
  • FIG. 5 is a diagram showing a polymer PTC thermistor according to the third embodiment
  • FIG. 5A is a plan view thereof
  • FIG. 5B is a rear view
  • FIG. 5C is a front view
  • FIG. 5D is a rear view
  • FIG. 5E is a left side view
  • FIG. 5F is a right side view.
  • FIG. 6 is a perspective view of a conventional polymer PTC device. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1A is a plan view of a polymer PTC thermistor according to the present embodiment.
  • FIG. 1B is a rear view
  • FIG. 1C is a front view
  • FIG. 1D is a rear view
  • FIG. 1E is a left side view
  • FIG. F is a right side view.
  • FIG. 2 is a perspective view of a polymer PTC thermistor according to the present embodiment.
  • the Bolima PTC Thermistor is used as a temperature sensing element in various electrical devices to protect the overheated circuit board.
  • reference numeral 1 denotes a conductive polymer
  • reference numerals 2 and 3 denote electrodes bonded to the conductive polymer
  • reference numerals 4 and 5 denote non-conductive resin films covering the electrodes 2 and 3 with the conductive polymer. is there.
  • the conductive polymer 1 has a rectangular plate shape with a uniform thickness (long side X short side X plate thickness; 1.6 O mrn X 0-8 O mm X 0.62 mm) in plan view. It is a polymer resin body composed by kneading carbon black and then crosslinking by radiation. At room temperature, a large number of conductive paths through which a current flows are formed inside the conductive polymer 11 at normal temperature due to the presence of the carbon black particles, thereby exhibiting good conductivity.
  • the electrodes 2 and 3 are provided at both ends of the conductive polymer 1 in the longitudinal direction.
  • the electrode 2 includes a copper electrode piece 2 a provided along one side surface 1 a of the conductive polymer 1, and a base 2 b provided at one end of the conductive polymer 11 connected to the electrode piece 2 a. And a nickel foil 2c interposed between the conductive polymer 1 and the electrode piece 2a.
  • the electrode 3 also has the same structure as the electrode 2; a copper electrode piece 3a provided along the other side surface 1b of the conductive polymer 1; and the other end of the conductive polymer 1 connected to the electrode piece 3a. And a nickel foil 3c interposed between the conductive polymer 1 and the electrode piece 3a.
  • the portion of the electrode piece 2a excluding the base end is a strip (length X width; 0.73 band X 0 ⁇ 40 mm), and is formed to have a thickness of 20 to 30 xm.
  • Electrode piece 2a is connected to conductive polymer 1. Although the longitudinal directions are the same, the width is narrower than the conductive polymer 1, and the two longitudinal edges 2d and 2d of the electrode piece 2a are on both sides of the conductive polymer 1. They are arranged at a distance of about 0.20 mm from each edge.
  • the tip of the electrode piece 2a is formed in a rectangular shape, and a gap of about 0.27 mm is provided between the electrode piece 2a and the counter electrode 3 (an electrode piece 3e described later).
  • the base 2 b is formed by forming the base end of the electrode piece 2 a and the copper electrode piece 2 e partially left on the other side 1 b of the conductive polymer 1 at one end of the conductive polymer 11. It is integrated along the concave portion 1 c, and a solder coating layer 2 ⁇ is formed on the surface thereof.
  • the thickness of the coating layer 2 f is about 20 to 35 m.
  • the electrode piece 3a also has the same shape as the electrode piece 2a, and has a strip shape with the same dimensions.
  • the two side edges 3d, 3d in the longitudinal direction of the electrode piece 3a are arranged at an interval of about 0.20 mm from both side edges of the conductive polymer 11 respectively.
  • the tip of the electrode piece 3a is formed in a rectangular shape, and a gap of about 0.27 band is provided between the electrode piece 3a and the counter electrode 2 (the above-described electrode piece 2e).
  • the base 3b is formed by forming the base end of the electrode piece 3a and the copper electrode piece 3e partially left on one side 1a of the conductive polymer 1 at the other end of the conductive polymer 1. It is integrated along the recess 1d, and has a solder coating layer 3f formed on its surface. The thickness of the coating layer 3 f is about 20 to 35 m.
  • the resin film 4 is formed so as to cover one side surface 1a of the conductive polymer 1 except for the base 2b and the electrode piece 2e so as to cover the entire electrode piece 2a. It is about 0 to 15 m.
  • the resin film 5 is also formed so as to cover and cover the other side surface 1 b of the conductive polymer 1 except for the base portion 3 b and the electrode piece 3 e. Is about 10 to 15 xm.
  • the polymer PTC thermistor having the structure described above functions as a switch triggered by the ambient temperature, utilizing the PTC characteristics of the conductive polymer 1.
  • the thermal expansion temperature of the conductive polymer 1 that is, the temperature at which the conductive path is interrupted, can be arbitrarily set by changing its own composition or adjusting the amount of carbon black. is there. Therefore, if you want to know whether the temperature of the object exceeds a certain value, change the composition of the conductive polymer 1 or adjust the amount of carbon black to set the thermal expansion temperature of the conductive polymer 1 to the above value. If the current is applied between the electrodes 2 and 3, the temperature of the object is lower than a certain value. If the current is interrupted, it is judged that the value exceeds a certain value. In this way, the polymer PTC is used as a temperature sensing element.
  • a polymer PCT thermistor in which the thermal expansion temperature of the conductive polymer 1 is set in consideration of the upper limit temperature at which the circuit board can normally operate is installed on the circuit board of various electric devices. If this is done, the circuit will be cut off if the board generates abnormal heat, so it is possible to maintain the electrical equipment.
  • FIG. 3A to 3E are cross-sectional views showing the state of the polymer PTC thermistor in each manufacturing process.
  • a peak 13 is prepared by pressing nickel foils 12 on both surfaces of a raw plate 11 of a conductive polymer having a uniform thickness. This portion will eventually become the conductive polymer 11 in the polymer PTC ceramic layer.
  • a plurality of rows of through holes 14 having the same pitch are formed at equal intervals.
  • Each portion of the polymer PTC thermistor is individually formed between the adjacent rows of the through holes 14, and the workpiece 13 is finally cut into a final product.
  • the through-holes 14 belonging to adjacent rows are concave portions 1c and Id.
  • a copper plating layer 15 is formed on both the front and back surfaces of the work 13 and the entire inner surface of the through hole 14. This part becomes electrodes 2 and 3.
  • a predetermined portion on each of the front and back surfaces of the work 13 is etched to remove the copper plating layer 15 and the nickel foil 12 and to remove the conductive polymer raw plate 11 from the portion. Expose the surface. This portion serves as a gap provided between the electrode piece 2a and the electrode piece 3e.
  • a resin layer 16 is formed so as to cover a predetermined portion of the copper plating layer 15 and a portion where the surface of the conductive polymer green plate 11 is exposed. This portion becomes the resin films 4 and 5.
  • a solder plating layer 17 is formed in other portions (including the inner surface of the hole 14) using the resin layer 16 as a mask. This part becomes the hang coating layers 2 f and 3 f. Thereafter, the work 13 is cut along the row of the through holes 14 and further cut in a direction parallel to the paper surface of FIG. 3 to obtain a polymer PTC ceramic as a final product.
  • the electrode 2a is arranged along one side 1a of the conductive polymer 1 while the side edge 2d of the electrode 2a is electrically conductive.
  • the electrode 1 By disposing the electrode 1 at a position away from the side edge of the polymer 1 and covering the side 1 a with the resin film 4 together with the electrode 2 a, the electrode 2 a is likely to start oxidation. Since it is separated from the boundary between the resin film 4 and the resin film 4 and is entirely covered with the resin film 4, it is not exposed to air. Thereby, oxidation of the electrode piece 2a can be prevented.
  • the conductive polymer 1 and the resin film 4 overlap around the electrode piece 2a to form a corrosion-resistant area for preventing moisture from entering, this also prevents oxidation of the electrode piece 2a. be able to. This is the expected effect for the electrode piece 3a as well.
  • the two electrode pieces 2a and 3a are respectively arranged on both sides of the plate-shaped conductive polymer 1, so that the conductive polymer 1 Work such as attaching the electrodes 2 and 3 to the electrodes and forming the resin films 4 and 5 covering the electrode pieces 2a and 3a becomes easier, and productivity can be improved.
  • the resin films 4 and 5 are formed so as to cover all the electrode pieces 2a and 3a, but the resin films 4 and 5 are formed between the conductive polymer 1 and the electrode pieces 2a and 3a.
  • the region is exposed to the outside including at least the boundary between the conductive polymer 1 and the electrode piece 2a, and is exposed to the outside including the boundary between the conductive polymer 1 and the electrode piece 3a.
  • a structure in which only the region is covered with the resin film may be adopted.
  • FIG. 4A is a plan view of the polymer PTC thermistor according to the present embodiment
  • FIG. 4B is a rear view
  • FIG. 4C is a front view
  • FIG. 4D is a rear view
  • FIG. 4E is a left side view
  • FIG. F is a right side view.
  • the components already described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • the electrode 12 is composed of a copper electrode piece 12 a provided along one side 1 a of the conductive polymer 1 and a copper electrode piece 12 b provided along the other side 1 b. And a base 12 c provided at one end of the conductive polymer 11 across the electrode pieces 12 a and 12 b, respectively, between the conductive polymer 1 and the electrode pieces 12 a and 12 b It consists of an interposed nickel foil 12d.
  • the electrode 13 also has the same structure as the electrode 12; the copper electrode piece 13a provided along one side 1a of the conductive polymer 1 and the copper electrode piece 13a provided along the other side 1b. Copper electrode piece 13b, base 13c provided at the other end of conductive polymer 1 across electrode pieces 13a and 13b, conductive polymer 1 and electrode piece 13 and nickel foil 13 d interposed between a and 13 respectively.
  • the electrode piece 12a has a right-angled triangular tongue shape (length: 0.73 mm) whose tip is cut obliquely, and the side edge 12e adjacent to the hypotenuse is made of conductive polymer 1 Although they are aligned in the longitudinal direction, they are arranged at a distance of about 0.10 from the side edge of the conductive polymer 1.
  • the electrode piece 13a also has the same shape and the same dimensions as the electrode piece 1a, and has the shape of a right-angled triangular tongue with its tip diagonally cut off. Although they are aligned in the longitudinal direction, they are also spaced from the side edges of the conductive polymer 1 by about 0.10 mm.
  • the electrode strips 12a and 13a are arranged on one side 1a of the conductive polymer 11 with their oblique sides facing in parallel with a gap of about 0.27 mm. However, the interval is set to be larger than the thickness of the conductive polymer 11.
  • the electrode pieces 12b and 13b are also arranged on the other side face 1b of the conductive polymer 1 in the same manner as the electrode pieces 12a and 13a, and the side edges 12e, 13 e are aligned with the longitudinal direction of the conductive polymer 1, and are spaced from the side edges of the conductive polymer 11 by about 0.10 mm.
  • the oblique sides of the tips face each other in parallel, and are arranged with a gap of about 0.27 mm.
  • the base 12c is formed by integrating the electrode pieces 12a and 12b along the recess 1c, and has a solder coating layer 12f formed on the surface thereof.
  • the base 13c is also formed by integrating the electrode pieces 13a and 13b along the recess 1d, and has a solder coating layer 13f formed on the surface thereof.
  • the thickness of each of the coating layers 12 f and 13 f is about 20 to 35 m.
  • the resin film 4 is formed so as to cover and hide all the electrode pieces 12a and 13a on one side 1a of the conductive polymer 1 except for the bases 12c and 13c.
  • the resin film 5 is also formed so as to cover the other side surface 1 b of the conductive polymer 1, excluding the base portions 12 c and 13 c, all over the electrode pieces 12 b and 13 b.
  • the polymer PTC semiconductor having the above structure also has a switching function triggered by the ambient temperature and a magnitude of the current conducted between the electrodes 12 and 13. However, the operation is the same, and the description is omitted. In addition, since the manufacturing process of the polymer PTC is similar to that of the first embodiment, the description thereof is omitted.
  • the electrode piece 12a is made to extend along one side 1a of the conductive polymer 11 while the side edge 12e of the electrode piece 12a is made of the conductive polymer.
  • the electrode piece 12a is likely to be a starting point of oxidation. Since it is separated from the boundary between 1 and the resin film 4 and is entirely covered with the resin film 4, there is no exposure to air. Thereby, oxidation of the electrode piece 12a can be prevented.
  • the conductive polymer 1 and the resin film 4 overlap with each other around the electrode piece 12a to form a corrosion-resistant area for preventing water from entering, this also prevents oxidation of the electrode piece 12a. can do. This is the electrode piece 1 The same effect is expected for 2b, 13a, and 13b.
  • FIG. 5A is a plan view of the polymer PTC thermistor according to the present embodiment
  • FIG. 5B is a rear view
  • FIG. 5C is a front view
  • FIG. 5D is a rear view
  • FIG. 5E is a left side view
  • FIG. F is a right side view.
  • the components already described in the above embodiments are denoted by the same reference numerals, and description thereof is omitted.
  • the electrode 22 includes a copper electrode piece 22 a provided along one side surface 1 a of the conductive polymer 1, and a base 2 provided at one end of the conductive polymer 1 connected to the electrode piece 22 a. 2b and a nickel foil 22c interposed between the conductive polymer 1 and the electrode piece 22a.
  • the electrode 23 also has the same structure as the electrode 22; a copper electrode piece 23a provided along one side 1a of the conductive polymer 1, and a conductive polymer connected to the electrode piece 23a.
  • 1 is composed of a base 23 b provided at the other end and a nickel foil 23 c interposed between the conductive polymer 1 and the electrode piece 23 a.
  • the other side surface 1b of the conductive polymer 1 is not provided with the electrode pieces 22a and 23a.
  • the electrode piece 22a is in the shape of a plow tooth, and each tooth 22d has a length of about 0.90 mm and a width of about 0.10 mm. Each tooth 22 d is arranged so that the longitudinal direction thereof coincides with the conductive polymer 11.
  • the electrode piece 23a also has the same shape and the same size as the electrode piece 22a, and has the shape of a plow tooth.
  • the longitudinal direction of each tooth 23d matches the conductive polymer 1 and the electrode piece 2a. They are arranged in a staggered combination with 2a facing each other's teeth.
  • the teeth 2 2 d, 23 3 d alternately combined are arranged at an interval of about 0.10 dragons, and the teeth 2 2 d, 2.3 d arranged outside the width direction of the conductive polymer 1 Are arranged at an interval of about 0.05 mm from the side edge of the conductive polymer 1.
  • the base 22 b is formed between the base end of the electrode piece 22 a and the other side 1 b of the conductive polymer 1.
  • the copper electrode piece 22 e partially left is integrated along the recess 1 c, and a hang coating layer 22 f is formed on the surface thereof.
  • the base 23b is formed by integrating the base end of the electrode 23a with the copper electrode 23e partially left on the other side 1b along the recess 1c.
  • the surface is covered with a solder coating layer 23 f.
  • the thickness of each of the coating layers 22 f and 23 f is about 20 to 35 m.
  • the resin film 4 is formed so as to cover one side surface 1a of the conductive polymer 1 except for the base portions 22b and 23b, thereby covering all the electrode pieces 22a and 23a.
  • the resin film 5 is formed so as to cover the other side surface 1 b of the conductive polymer 1 except for the electrode pieces 22 e and 23 e.
  • the polymer PTC thermistor having the above structure also has a switching function triggered by the environmental temperature, and a switching function triggered by the magnitude of the current passed between the electrodes 22 and 23. It has a function, but its operation is the same, and its explanation is omitted. Also, the manufacturing process of the polymer PTC thermistor is the same as that of the first embodiment, and the description thereof is omitted.
  • the electrode pieces 22a and 23a formed in a plow-like shape are combined with the respective teeth 22d and 23d alternately, and the conductive polymer 1
  • the electrode strips 2 2a and 23a are the beginnings of oxidation by arranging them at a position separated from the side edge of It is separated from the boundary between the conductive polymer 1 and the resin film 4 which is easy to be covered, and all is covered with the resin film 4, so that it is not exposed to air. Thereby, oxidation of the electrode pieces 22a and 23a can be prevented.
  • the conductive polymer 1 and the resin film 4 overlap each other around the electrode pieces 22a and 23a which are alternately combined to form a corrosion-resistant area which prevents the ingress of moisture. In addition, oxidation of the electrode pieces 22a and 23a can be prevented.
  • the electrodes 22 and 23 are attached to the conductive polymer 1 and the resin film 4 that covers the electrode pieces 22 a and 23 a is formed. Easy to work, manufacture polymer PCT thermistor In this case, productivity can be improved.
  • the polymer PTC thermistor was used as a temperature sensing element for the purpose of protecting a circuit board that overheated.
  • the polymer PTC thermistor according to the present invention was used.
  • the secondary battery is used as an overcurrent protection element for preventing overcharge of a secondary battery such as a lithium ion secondary battery, a nickel hydride secondary battery, and a cadmium secondary battery.
  • an electrode is disposed along a certain side surface of the conductive polymer and at a position away from the edge of the side surface, and a resin film covering the side surface so as to wrap the electrode
  • the electrode is separated from the boundary between the conductive polymer and the resin film, which is likely to start oxidation, and is covered with the resin film on the conductive polymer.
  • This prevents water from entering and prevents oxidation of the electrode, thus preventing the polymer PTC thermistor from deteriorating in performance due to this.
  • the conductive polymer and the resin film overlap around the electrode to form a corrosion-resistant region that blocks the ingress of moisture, this also prevents the electrode from being oxidized and the polymer PTC Performance degradation can be prevented.
  • a conductive polymer is formed in a plate shape, distributed to two sides of the conductive polymer, one electrode is arranged, and the two sides are wrapped around the electrode.
  • Forming a resin film that covers each of the electrodes facilitates the work of attaching the electrodes to the conductive polymer and forming the resin films that cover the electrodes. Performance can be improved.
  • two electrodes are disposed on a certain side of a conductive polymer at a distance from each other, and a resin that covers the two electrodes so as to cover the side is provided.
  • a resin that covers the two electrodes so as to cover the side is provided.
  • the temperature sensor according to the present invention, clear temperature detection is possible by using the polymer PTC thermistor of the present invention as a temperature detecting element. Furthermore, for example, by installing a polymer PCT thermistor on which the thermal expansion temperature of the conductive polymer is set in consideration of the upper limit temperature at which the circuit board can normally operate, on a circuit board of various electric devices, The circuit is cut off when the board generates abnormal heat, which helps maintain electrical equipment.

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Abstract

L'invention concerne une thermistance CTP polymère comprenant une couche polymère conductrice (1) de type CTP et des électrodes reliées à cette couche polymère conductrice (1). Les électrodes (2, 3) sont disposées le long des deux faces (1a, 1b) de la couche polymère conductrice (1), à une certaine distance des bords des faces (1a, 1b). La thermistance CTP comprend également des pellicules de résine (4, 5) qui recouvrent les faces (1a, 1b) de la couche polymère conductrice (1) et enveloppent les électrodes (2, 3). L'invention concerne également un capteur thermique comprenant la thermistance CTP polymère.
PCT/JP2002/011889 2001-11-15 2002-11-14 Thermistance ctp polymere et capteur thermique WO2003043032A1 (fr)

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EP02803119A EP1492131B1 (fr) 2001-11-15 2002-11-14 Thermistance ctp polymere et capteur thermique
AT02803119T ATE549724T1 (de) 2001-11-15 2002-11-14 Polymer-ptc-thermistor und temperatursensor
US10/495,598 US20050062581A1 (en) 2001-11-15 2002-11-14 Polymer ptc thermistor and temperature sensor

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JP2001350737A JP3857571B2 (ja) 2001-11-15 2001-11-15 ポリマーｐｔｃサーミスタおよび温度センサ
JP2001-350737 2001-11-15

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FR3006439B1 (fr) * 2013-06-04 2016-04-29 Commissariat Energie Atomique Capteur de temperature a pate thermosensible
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EP3004824B1 (fr) * 2013-06-04 2017-05-03 Commissariat à l'Énergie Atomique et aux Énergies Alternatives Capteur de temperature a pate thermosensible
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EP3585134B1 (fr) * 2018-06-18 2022-08-03 Mahle International GmbH Module de chauffage ptc
EP3584808B1 (fr) * 2018-06-18 2021-10-06 Mahle International GmbH Module de chauffage ptc destiné à chauffer un fluide
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ATE549724T1 (de) 2012-03-15
US20050062581A1 (en) 2005-03-24
EP1492131A4 (fr) 2005-01-05
KR20050044463A (ko) 2005-05-12
EP1492131B1 (fr) 2012-03-14
TW200305892A (en) 2003-11-01
JP3857571B2 (ja) 2006-12-13
KR100972251B1 (ko) 2010-07-23
JP2003151806A (ja) 2003-05-23
EP1492131A1 (fr) 2004-12-29
CN1613123A (zh) 2005-05-04

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